A floor mounted hinge with spring tension that allows a door to swing in or out of a room and return to the closed position when let go. Also called double acting floor hinge or pivoting door assembly.

Also called turnkey, is usually an oval or crescent shaped knob which is turned to operate the dead bolt of a privacy or entry mortise lock. Thumbturns can be mounted on a door knob backplate in place of a keyhole or can be separate pieces with their own small trim plate.